actually, sephiroth wields his sword with both hands, he's not necessarily left handed, i'm not real sure where you got that from, in advent children neither cloud nor sephiroth are left or right handed, in fact, they are quite ambidextrous.
and no you don't need to have second chance, you merely have to be smart enough to know when to use a potion or elixer. sephiroth has a spell that takes all of your mp and all but 1 hp but if you see it comming and either stop him before he casts or time you ether, potion or elixer just right you can restore hp's/mp's before he even has a chance to try and charge you again.
i'd say link's best moves are nayru's love, din's fire and his spin attack. unless he uses the dieties mask. Sora has many more moves however to make up for his lack of inventory in battle, he has ragnorok, archanum, sonic blade, and the trinity blast thingy. both characters i would say are equally maneuverable, but in kh battle format link would own sora. fighting in kh format, a decent player could probably even beat sephiroth AND cloud at the same time using link. if only square made an alternate version to the battle like that...that would be interesting.
Umm...has anyone played Kingdom Hearts 2 here? Sora could fly around and took down 1,000 Heartless. 1,000 by himself! That's more impressive then anything Link has done. Not to mention Cloud and Sephiroth would end up beating Link mainly due to brute force and power and Sora defeated both of them. Not to mention Master Form and Valor Form and Anti-Form Sora would overwhelm Link. And the cut scene showing Cloud vs. Sephiroth shown that Sora was able to keep up with that.
as much as I love to psychically explore the cosmos and think of myself as a baby hippopotamus
well you say that but you base that off of cutscenes, which most zelda games have very few of, so we have to look at gameplay which in terms they are far too similar, but in the end link just has to well of a developed technique to lose to sora's untrained sloppy barbarian swing fighting.
Is it even canon that Sora defeats Cloud or Squall or even Hercules? I mean, Tidus and Wakka did not grow up on the same island, and Tidus had never wield a sword before, and all this is in Kingdom Hearths. Isen't it just for fun?
Necessity is the mother of inventions.
(Don't be a pig, get an Icejaw sig.)